4-phytase
4-phytase | |||||||||
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Identifiers | |||||||||
EC number | 3.1.3.26 | ||||||||
CAS number | 9001-89-2 | ||||||||
Databases | |||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
Gene Ontology | AmiGO / EGO | ||||||||
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In enzymology, a 4-phytase (EC 3.1.3.26) is an enzyme that catalyzes the chemical reaction
- myo-inositol hexakisphosphate + H2O 1D-myo-inositol 1,2,3,4,5-pentakisphosphate + phosphate
Thus, the two substrates of this enzyme are myo-inositol hexakisphosphate and H2O, whereas its two products are 1D-myo-inositol 1,2,3,4,5-pentakisphosphate and phosphate.
This enzyme belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds. The systematic name of this enzyme class is myo-inositol-hexakisphosphate 6-phosphohydrolase. Other names in common use include 6-phytase (name based on 1L-numbering system and not 1D-numbering), phytase, and phytate 6-phosphatase. This enzyme participates in inositol phosphate metabolism.
References
- Johnson LF; Tate ME (1969). "The structure of myo-inositol pentaphosphates". Ann. N. Y. Acad. Sci. 165 (2): 526–32. doi:10.1111/j.1749-6632.1970.tb56420.x. PMID 4310376.
- Tomlinson RV; Ballou CE (1962). "Myoinositol polyphosphate intermediates in the dephosphorylation of phytic acid by phytase". Biochemistry. 1: 166–171. doi:10.1021/bi00907a025. PMID 13921788.
- Lim PE; Tate ME (1973). "The phytases. II. Properties of phytase fractions F 1 F 2 from wheat bran and the myoinositol phosphates produced by fraction F 2". Biochim. Biophys. Acta. 302 (2): 316–28. doi:10.1016/0005-2744(73)90160-5. PMID 4349266.
- Cosgrove DJ. "Inositol Phosphates: Their Chemistry, Biochemistry, and Physiology, Elsevier, Amsterdam, 1980".
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